No, nobody can. Each cpu, motherboard, RAM combination is just slightly different and that is why is it so "expensive" in a time consuming way to overclock -- that is to take your system above the rated "sure thing" common denominator speed up to a faster speed that will still be completely reliable.

Also, make sure you dump the stock cpu cooler for something better even if you plan on running stock speeds on a 6-core 980. You want to keep things cool and Intel's bundled stock coolers are never the best option to do that.